Post-Dural Puncture Headache

• Hospital centre CHD VENDEE — La Roche-sur-Yon, France
• Hospital centre LE MANS — Le Mans, France
• University Hospital NANTES — Nantes, France
• Hospital centre CORNOUAILLE — Quimper, France

• Cairo University — Cairo, Egypt

• Fayoum University hospital — El Fayoum Qesm, Faiyum Governorate, Egypt

Not specified

• Departement of Neurology, NLSH HF — Bodø, Norway

• Zagazig University Hospitals — Zagazig, Sharqia Province, Egypt

• Derince Research and Training Hospital — Kocaeli, Turkey (Türkiye)

• University Hospital Leicester — Leicester, United Kingdom

Not specified

• Suzhou municipal hospital — Suzhou, Anhui, China
• the second hospital of Hebei medcial university — Shijiazhuang, Hebei, China
• Henan Province Hospital of Traditional Chinese Medicine — Zhengzhou, Henan, China
• Jinzhou central hospital — Jinzhou, Liaoning, China